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cannam@127:This chapter describes the installation and customization of FFTW, the cannam@127: latest version of which may be downloaded from cannam@127: the FFTW home page. cannam@127:
cannam@127:In principle, FFTW should work on any system with an ANSI C compiler
cannam@127: (gcc is fine). However, planner time is drastically reduced if
cannam@127: FFTW can exploit a hardware cycle counter; FFTW comes with cycle-counter
cannam@127: support for all modern general-purpose CPUs, but you may need to add a
cannam@127: couple of lines of code if your compiler is not yet supported
cannam@127: (see Cycle Counters). (On Unix, there will be a warning at the end
cannam@127: of the configure output if no cycle counter is found.)
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Installation of FFTW is simplest if you have a Unix or a GNU system, cannam@127: such as GNU/Linux, and we describe this case in the first section below, cannam@127: including the use of special configuration options to e.g. install cannam@127: different precisions or exploit optimizations for particular cannam@127: architectures (e.g. SIMD). Compilation on non-Unix systems is a more cannam@127: manual process, but we outline the procedure in the second section. It cannam@127: is also likely that pre-compiled binaries will be available for popular cannam@127: systems. cannam@127:
cannam@127:Finally, we describe how you can customize FFTW for particular needs by cannam@127: generating codelets for fast transforms of sizes not supported cannam@127: efficiently by the standard FFTW distribution. cannam@127: cannam@127:
cannam@127:| • Installation on Unix: | cannam@127: | |
| • Installation on non-Unix systems: | cannam@127: | |
| • Cycle Counters: | cannam@127: | |
| • Generating your own code: | cannam@127: |
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